The Queen is very much a creature of habit; every day, it has been reported, just before lunch, she likes a glass of gin mixed with a fortified wine called Dubonnet. Her garnish? A slice of lemon – with the pips removed. At lunchtime, she drinks wine, and in the evening, a glass or two of champagne. It's been calculated that she sups a total of six units a day, which rather amusingly would make Her Majesty a binge drinker by government standards.

However much our monarch imbibes, however, it’s unlikely to be as much as the Queen Mother, who could knock back a few – often at The Goring. With such fervour did she enjoy a gin and Dubonnet that in some bars the beverage is even named after her. The only question is why this herbal wine hasn’t got a Royal warrant. Maybe because it’s French.

If gin and Dubonnet doesn't float your royal barge however, there are countless other ways to drink like a royal. Here are some of The Firm's favourites.

Prince Philip

Hop to it: Prince Philip likes his beerCredit:
AP

If you're not a fan of spirits, try the Duke of Edinburgh’s preferred tipple – beer. Most sources say that his bitter of choice is Boddingtons.

But as the Burton Mail last month reported, the palace has also just requested some bottles of Diamond ales too. This Midlands brewery ceased production in the 1990s, but is launching a new range called Dual Diamond. Prince Philip even visited Burton in 1995. Unglamorous, but so very British.

The Duchess of Cornwall

Refreshing: the Duchess of Cornwall's favourite, a G&T

The Duchess of Cornwall likes a G&T. It’s rumoured that after she finally had a conversation with Prince William bout her relationship with his father, she exited the 30-minute meeting and announced: “I need a gin and tonic”.

Entirely fair, we feel.

The Prince of Wales

Talking of Prince Charles, the heir to the throne likes a martini, but made - not entirely fashionably these gin-heavy days - with equal parts gin and dry vermouth. Probably less likely to get you embarrassingly drunk at a state banquet, though.

The Prince of Wales is partial to a Scotch on occasionCredit:
Ian Jones

If you’ve had enough gin, Charles also likes a Scotch - especially Laphroig 15-year-old, we hear.

It’s an opulent serve of a variety of spirits, including, but not limited to, brandy and peach liqueur, all topped off with a bottle of Champagne. You drink it out of a wooden chest. It’s quite good.

Apparently, in the prince’s younger days, he sometimes went for Stella Artois and Sambuca shots. Forgive him; we were all students once.

The Duchess of Cambridge

A Jack Daniel's for the Duchess, pleaseCredit:
AP

Kate is partial to a splash of our good friend Mr Jack Daniel, apparently.

But don’t be too perturbed by her liking for what for most of us is the last drink of the night – that last hurrah before you order an Uber and some fried chicken. Friends say her all-time favourite is a ‘Crack Baby’, a signature cocktail at Prince Harry's favourite nightclub, Boujis. No crack – just vodka, raspberry liquor, passion fruit and champagne. Much like a Mahiki treasure chest...funnily enough.

The Duchess enjoys cocktailsCredit:
AP

Prince Harry

We know Prince Harry likes a drink. But there’s no reputation tarnishing here, because don’t we all.

Ever on-trend (see the latest Zoolander 2 movie shoot if you’re struggling), the party boy likes a Ciroc Ultra – a premium brand vodka. It’s made with grapes, which gives it an elegant twang and subtle acidity. And, thanks to Ben Stiller, it really is so hot right now.

Prince Harry has a soft spot for vodka and Red BullCredit:
Getty

But never fear. You don’t have to stick to such a delicacy all night; from time-to-time, Harry’s also supposed to partake of a vodka and Red Bull.

Night cap

You’re home, you’re tired, you need to finish your cheesy chips and whatever you can find lurking in the fridge that doesn't have mould on it and go to bed. But hold on! Someone’s got the rather splendid idea of one more to bid farewell to tomorrow morning.